Added the Elixir implementation of Zarr to implementations/index.md

[thanos]

Although a lit of work is still needed this is a production release and is now used in production.

Why ExZarr?

• 26x faster parallel chunk reads
• Full compatibility with Python zarr-python
• Multiple storage backends (S3, GCS, filesystem, etc.)
• Production-ready (1,713 tests, 80% coverage, zero warnings)
• Comprehensive security documentation
• Installation: {:ex_zarr, "~> 1.0"}

Links:

• Hex: https://hex.pm/packages/ex_zarr
• Docs: https://hexdocs.pm/ex_zarr
• GitHub: https://github.com/thanos/ExZarr

[d-v-b]

awesome!